In a skillet cook the onions in the butter and
the oil over moderate heat, stirring occasionally, until they are
crisp and golden and transfer them with a slotted spoon to paper towels
to drain. In the fat remaining in the skillet cook the mushrooms and
the garlic over moderately low heat, stirring occasionally, until
the mushrooms begin to turn brown and transfer the mixture to a plate.
Add the broth to the skillet and deglaze the skillet, scraping up
the brown bits. Add the cream, the ketchup, the Worcestershire sauce,
and the mustard and stir in the mushroom mixture and the steak slices.
Divide the steak mixture among the bottom bread pieces, sprinkle it
with some of the onions, and top the onions with the remaining bread
pieces.
|
